Array Antenna System in Base Station

An array antenna system in a Base Station (BS), comprising:

• a horizontal-beam-radiation-pattern-forming module having a horizontal-beam-radiation-pattern-former configured to form a horizontal-beam radiation pattern for transmission/reception signals, to divide signals received from input/output ports at one end, to shift the phases of the divided signals complementarily, to combine the phase-shifted signals from the different input/output ports at the one end, to output the combined signals to input/output ports at the other end, and to output signals received from the input/output ports at the other end by a reverse operation to the input/output ports at the one end, for receiving/outputting a plurality of transmission/reception signals from/to a Base Transceiver Station (BTS) via the input/output ports at the one end of the horizontal-beam-radiation-pattern-former and receiving/outputting a plurality of transmission/reception signals from/to a plurality of antennas via the input/output ports at the other end of the horizontal-beam-radiation-pattern-former;
• and
• a plurality of vertical-beam-radiation-pattern-forming modules installed on an antenna basis and configured to form a vertical-beam radiation pattern for the transmission/reception signals, each configured to receive a transmission signal from the horizontal-beam-radiation-pattern-forming module, to divide the transmission signal, to provide the divided signal to antenna elements, to filter and amplify signals received from the antenna elements according to a predetermined reception band, to combine the amplified signals, and to provide the combined signal to the horizontal-beam-radiation-pattern-forming module.